30results about How to "Reduce the number of blowback" patented technology

The invention provides an energy-saving low-pressure cold-brew melamine production technology which comprises a melamine reactor, hot-gas coolers, filters, a crystallizer, a trap, a carrier gas compressor, a cool gas fan, a urine washer, a carrier gas heater and the like. The crystallizer is provided with a double-layer cool gas circular canal at the upper part, and a rotary material scraper at the lower part; gas inlets of the carrier gas compressor and the cool gas fan are separated, the gas inlet of the carrier gas compressor adopts hot process gas, and the gas inlet of the cool gas fan adopts cool process gas; a path of hot process gas is lead out from the carrier gas heater, and is matched with hot ammonia gas or superheated vapor, and the mixture gas enters the hot-gas coolers and the filters; the filters are arranged in series or in parallel. The device of the energy-saving low-pressure cold-brew melamine production technology is low in construction investment, low in consumption, and high in operating flexibility, the premium grade rate can reach 95%, and the continuous operation cycle of the device can be 4-6 months or more.

The invention relates to the technical field of air conditioners, and particularly relates to a defrosting control method for an air conditioner. In order to improve the defrosting efficiency of the air conditioner, the defrosting control method for the air conditioner is used for the air conditioner with a bypass defrosting loop and includes the steps that when the air conditioner needs to enterthe defrosting mode, an outdoor fan is controlled to stop rotating, and the bypass defrosting loop is opened; a first set period of time after the outdoor fan stops rotating, the outdoor fan is controlled to reversely rotate for a second set period of time; after the outdoor fan is reversely rotated for the second set period of time, the outdoor fan is controlled to reversely rotate for the secondset period of time selectively according to at least one of an upper t, a middle t and a lower t; when the outdoor fan is reversely rotated, the bypass defrosting loop is closed, and after the outdoor fan is reversely rotated for the second set period of time, the bypass defrosting loop is opened after time t; and the time t is determined according to a range of outdoor fan current value and an indoor temperature. The defrosting control method can precisely control the reverse rotating opportunity of the outdoor fan and greatly improve the defrosting efficiency of the air conditioner.

The invention belongs to the technical field of air conditioners, and particularly relates to a defrosting control method for an air conditioner. In order to improve the defrosting efficiency of the air conditioner, the defrosting control method for the air conditioner aims at the air conditioner with a bypass defrosting loop. The defrosting control method comprises the steps: when the air conditioner needs to enter into a defrosting mode, an outdoor fan is controlled to stop rotating, and the bypass defrosting loop is started; after the outdoor fan stops rotating for the first set time, the outdoor fan is controlled to rotate reversely for the second set time; after the outdoor fan rotates reversely for the second set time, the outdoor fan is selectively controlled to rotate reversely forthe second set time again according to at least one of t<upper>, t<middle> and t<lower>; when the outdoor fan rotates reversely, the bypass defrosting loop is stopped, after the outdoor fan rotates reversely for the second set time, the bypass defrosting loop is started again after the time t; and the time t is determined according to the average value of t<upper>, t<middle> and t<lower>. The reverse rotation opportunity of the outdoor fan can be accurately controlled, and the defrosting efficiency of the air conditioner is improved greatly.

The invention discloses a blowback dust removal method for a TRT dry dust removal system, belongs to the technical field of design and manufacture of metallurgical environment-friendly dust removal equipment. The blowback dust removal method for the TRT dry dust removal system has a good dust removal effect and is capable of effectively prolonging the service life of a discharge bag. By virtue of the blowback dust removal method, in the process of blowback dust removal, the discharge bag is blown back once each time, and blowback dedusting is completed by virtue of repeated delayed operation.

The invention belongs to the technical field of air conditioners, and particularly relates to an air conditioner defrosting control method. For improving defrosting efficiency of the air conditioner with a bypass defrosting loop, the air conditioner defrosting control method includes the following steps: when the air conditioner needs to entre a defrosting mode, acquiring temperature Toil of an outer coil of the air conditioner; selectively enabling the air conditioner to enter a bypass defrosting mode or a reverse cycle defrosting mode according to the temperature Toil; when the air conditioner enters the bypass defrosting mode, intermittently controlling the bypass defrosting loop to open / close, and controlling an outdoor draught fan to reverse for set time under the closing state of thebypass defrosting loop; and confirming opening time of the bypass defrosting loop and the set time according to the following mode: acquiring indoor environment temperature Troom; and confirming theopening time of the bypass defrosting loop and the set time according to the temperature Troom. The air conditioner defrosting control method can accurately select the optimum defrosting mode and efficiently blow off molten frost layers, and greatly improves defrosting efficiency of the air conditioner.

The invention provides an energy-saving low-pressure extraction and cooling melamine production process, including a melamine reactor, a hot air cooler, a filter, a crystallizer, a trap, a carrier gas compressor, a cold air fan, a urine scrubber, a carrier gas heater, etc. . The upper part of the crystallizer has a double-layer cold air ring pipe, and the lower part of the crystallizer has a rotary scraper; the air intake of the carrier gas compressor and the air-conditioning fan are separated, the air intake of the air-conditioning compressor adopts hot process air, and the air intake of the air-conditioning fan adopts cold process air; From the outlet of the carrier gas preheater, a hot process gas is led out to distribute hot ammonia gas or superheated steam into the hot gas cooler and filter; the filters are set in series and parallel. The low-pressure extraction and cooling melamine production process device of the present invention has less construction investment, low consumption, high operating flexibility, high-grade product rate can reach 95%, and the continuous operation period of the device can reach more than 4 to 6 months.

The invention belongs to the technical field of air conditioners and particularly relates to an air conditioner defrosting control method. The air conditioner defrosting control method aims to improvethe defrosting efficiency of the air conditioner. The air conditioner defrosting control method is directed against an air conditioner with a bypass defrosting loop. The air conditioner defrosting control method comprises the following steps that when the air conditioner needs to enter the defrosting mode, an outdoor fan is controlled to stop rotation, and the bypass defrosting loop is started; after the outdoor fan stops rotation for a first set time period, the outdoor fan is controlled to rotate reversely for a second set time period; after the outdoor fan rotates reversely for the secondset time period, the temperature t<upper> of the upper part of an outer coiler, the temperature t<middle> of the middle of the outer coiler and the temperature t<lower> of the lower part of the outercoiler are detected; and according to at least one of the temperature t<upper>, the temperature t<middle> and the temperature t<lower>, the outdoor fan is controlled to rotate reversely for the secondset time period again. By the adoption of the air conditioner defrosting control method, the reverse rotation moment of the outdoor unit can be more accurately controlled, the number of times of reverse blowing of the outdoor fan is reduced, and the outdoor fan can more accurately and more efficiently blow off a molten frost layer.

The invention discloses a backflushing dust removal method for a TRT dry dust removal system, which belongs to the technical field of metallurgical environmental protection dust removal equipment design and manufacture. Provided is a backflushing dust removal method for TRT dry dust removal system, which has good dust removal effect and can effectively prolong the service life of dust removal bags. In the process of backflushing and dedusting, the backflushing and dedusting method adopts the backflushing of the dust-removing cloth bag only once each time, and completes the backflushing and dedusting through multiple time delay operations.

The invention belongs to the technical field of air conditioners, and particularly relates to a defrosting control method for an air conditioner. In order to improve defrosting efficiency of the air conditioner, the defrosting control method for the air conditioner controls the air conditioner with a bypass defrosting loop. The method comprises the following steps: while the air conditioner needsto enter a defrosting mode, controlling an outdoor fan to stop rotation, and opening the bypass defrosting loop; after the outdoor fan stops rotation by first set time, controlling the outdoor fan toreversely rotate by second set time; after the outdoor fan reversely rotates by second set time, selectively controlling the outdoor fan to reversely rotate by second set time according to at least one of t-upper, t-middle and t-lower; while the outdoor fan reversely rotates, closing the bypass defrosting loop, and opening the bypass defrosting loop through time t after the outdoor fan reversely rotates by second set time; and determining the time t according to a difference value of I and Ie. The defrosting control method can control a reverse rotation opportunity of the outdoor fan more precisely, and greatly improves air conditioner defrosting efficiency.

The invention discloses a dedusting filter element, and belongs to the field of air filter parts. The dedusting filter element mainly comprises a V-shaped continuous folding filter layer and a supporting protection layer arranged in the V-shaped continuous folding filter layer, the novel dedusting filter element further comprises an iron injecting bottom and an iron injecting head, and the iron injecting bottom is bond to the interior of one end of the V-shaped continuous folding filter layer and in a gear shape; and the iron injecting head is bond to one end of the V-shaped continuous foldingfilter layer to wrap the V-shaped continuous folding filter layer, and is in a circular ring shape. The dedusting filter element has the beneficial effects that the dedusting filter element is good in structural strength, the iron injecting amount of the iron injecting bottom is appropriate, a polyester fiber thermal coated nanometer film is adopted, and the unit micropore amount is as much as 20times of a common filter element. Open type filter layers are formed by adopting an iron injecting technique, dust can easily slide down rather than being accumulated. The distance and the angle of the filter layers are appropriate, so that dust is not prone to being clamped between the filter layers, dust cannot be accumulated easily on the surfaces of the novel filter layers, the back blowing frequency is lowered, and the energy consumption is declined.

The invention belongs to the technical field of air conditioners, and particularly relates to an air conditioner defrosting control method. In order to improve the defrosting effect of an air conditioner, the air conditioner defrosting control method aims at the air conditioner with a bypass defrosting circuit. The method includes the following steps of controlling an outdoor fan to stop rotatingand opening the bypass defrosting circuit when the air conditioner needs to enter a defrosting mode, controlling the outdoor fan to rotate backwards for second set time after the outdoor fan stops rotating for first set time, selectively controlling the outdoor fan to rotate backwards again for second set time according to the currents of the outdoor fan after the outdoor fan rotates backwards forsecond set time, closing the bypass defrosting circuit when the outdoor fan rotates backwards, and opening the bypass defrosting circuit preset time later after the outdoor fan rotates backwards forsecond set time. The backwards-rotating moment of the outdoor fan can be more precisely controlled, the back flushing frequency of the outdoor fan is reduced, and the defrosting efficiency of the airconditioner is greatly improved.

The invention belongs to the technical field of air conditioners, and particularly relates to a defrosting control method of an air conditioner. In order to improve the defrosting control efficiency of the air conditioner, aiming at the air conditioner with a bypass defrosting loop, the defrosting control method of the air conditioner comprises the steps that when the air conditioner needs to getinto a defrosting mode, an outdoor fan is controlled to stop rotating, and the bypass defrosting loop is started; after the outdoor fan stops rotating for first set time, the outdoor fan is controlledto rotate reversely for second set time; after the outdoor fan rotates reversely for the second set time, the outdoor fan is selectively controlled to rotate reversely again for the second set time according to at least one of t<upper>, t<mid> and t<lower>; and when the outdoor fan rotates reversely, the bypass defrosting loop is closed, and after the outdoor fan reversely rotates for the secondset time, the bypass defrosting loop is started after the time t, wherein the time t is determined according to indoor temperature, the t<upper> and the t<mid>. According to the defrosting control method, the reverse rotating opportunity of the outdoor fan can be precisely controlled, and the defrosting efficiency of the air conditioner is greatly improved.

The invention belongs to the technical field of air conditioners, and particularly relates to a defrosting control method of an air conditioner. In order to improve the defrosting efficiency of the air conditioner, the provided defrosting control method of the air conditioner is proposed for the air conditioner with a bypass defrosting circuit, the method includes the steps that when the air conditioner needs to enter into a defrosting mode, an outdoor fan is controlled to stop rotating, and the bypass defrosting circuit is opened; after the outdoor fan stops rotating for first set time, the outdoor fan is controlled to reverse for second set time; after the outdoor fan reverses for the second set time, the outdoor fan is selectively controlled to reverse for the second set time again according to one or more of t<upper>, t<middle> and t<lower>; when the outdoor fan reverses, the bypass defrosting circuit is closed, and after the outdoor fan reverses for the second set time, the bypassdefrosting circuit is opened after time t; and the time t is determined according to the range of a current value I of the outdoor fan. According to the defrosting control method, reversing time of the outdoor fan can be accurately controlled, and the defrosting efficiency of the air conditioner is greatly improved.

The invention belongs to the technical field of air conditioners, and particularly relates to a defrosting control method of an air conditioner. In order to improve the defrosting efficiency of the air conditioner, the defrosting control method of the air conditioner is provided, and the defrosting control method aims at the air conditioner with a bypass defrosting loop. The method includes the steps that when the air conditioner needs to get into a defrosting manner, an outdoor fan is controlled to stop rotating, and the bypass defrosting loop is switched on; after the outdoor fan stops rotating for a first set time, the outdoor fan is controlled to reversely rotate for a second set time; after the outdoor fan reversely rotates for the second set time, the outdoor fan is selectively controlled to reversely rotate for the second set time again according to at least one of t<upper>, t<middle> and t<lower>; and when the outdoor fan reversely rotates, the bypass defrosting loop is switched off, and after the outdoor fan reversely rotates for the second set time, the bypass defrosting loop is switched on after the time t, wherein the t is determined according to the t<upper>, the t<middle> and the t<lower>. The reverse rotation time of the outdoor fan can be precisely controlled, and the defrosting efficiency of the air conditioner is greatly improved.

The invention belongs to the technical field of air conditioners, and in particular relates to an air conditioner defrosting control method. In order to improve the defrosting efficiency of the air conditioner, the air conditioner defrosting control method proposed in the present invention is aimed at an air conditioner with a bypass defrosting circuit. The method includes the following steps: when the air conditioner needs to enter the defrosting mode, obtain the External coil temperature Toil; selectively make the air conditioner enter bypass defrosting mode or reverse cycle defrosting mode according to Toil; when the air conditioner enters bypass defrosting mode, control the opening / closing of bypass defrosting circuit at intervals , and when the bypass defrosting circuit is closed, the outdoor fan is controlled to reverse the set time; the opening time of the bypass defrosting circuit and the set time are based on t 上 , t 中 and t 下 The average value is determined. The invention can accurately select the best defrosting mode, and efficiently blow off the melted frost layer, thereby greatly improving the defrosting efficiency of the air conditioner.

The invention belongs to the technical field of air conditioners, and in particular relates to an air conditioner defrosting control method. In order to improve the defrosting efficiency of the air conditioner, the air conditioner defrosting control method proposed by the present invention is aimed at the air conditioner with a bypass defrosting circuit. The method includes: when the air conditioner needs to enter the defrosting mode, control the outdoor fan to stop rotating, And open the bypass defrosting circuit; after the outdoor fan stops rotating for the first set time, control the outdoor fan to reverse for the second set time; when the outdoor fan reverses for the second set time, according to t 上 , t 中 and t 下 At least one of them selectively controls the outdoor fan to reverse for a second set time; when the outdoor fan is reversed, the bypass defrosting circuit is closed, and after the outdoor fan is reversed for the second set time, time t Open the bypass defrosting circuit; the time t depends on the indoor temperature and t 上 and t 中 Sure. The invention can accurately control the reverse timing of the outdoor fan, and greatly improve the defrosting efficiency of the air conditioner.

The invention belongs to the technical field of air conditioners, and specifically relates to an air conditioner defrosting control method. In order to improve the defrosting efficiency of the air conditioners, the air conditioner defrosting control method is for the air conditioners with bypass defrosting loops. The method includes the following steps that when an air conditioner needs to enter the defrosting mode, an outdoor draught fan is controlled to stop rotating, and a bypass defrosting loop is started; after rotation stoppage of the outdoor draught fan lasts for the first set time, theoutdoor draught fan is controlled to rotate backwards for the second set time; according to at least one of t[upper], t[middle] and t[lower], the outdoor draught fan is selectively controlled to rotate backwards again for the second set time; and when the outdoor draught fan rotates backwards, the bypass defrosting loop is stopped, and after the outdoor draught fan rotates backwards for the second set time, the bypass defrosting loop is started the preset time later. By means of the air conditioner defrosting control method, the backward rotation opportunity of the outdoor draught fan can bemore precisely controlled, the number of blowback times of the outdoor draught fan is decreased, and the defrosting efficiency of the air conditioner is also greatly improved.

The invention belongs to the technical field of air conditioners, and in particular relates to an air conditioner defrosting control method. In order to improve the defrosting efficiency of the air conditioner, the air conditioner defrosting control method proposed by the present invention is aimed at the air conditioner with a bypass defrosting circuit, and the method includes the following steps: when the air conditioner needs to enter the defrosting mode, control the outdoor fan Stop the rotation and open the bypass defrosting circuit; after the outdoor fan stops rotating for the first set time, control the outdoor fan to reverse for the second set time; and according to t 上 , t 中 and t 下 At least one of them selectively controls the outdoor fan to reverse for a second set time; when the outdoor fan is reversed, the bypass defrosting circuit is closed, and after the outdoor fan is reversed for a second set time, the preset time to open the bypass defrost circuit. The invention can not only control the reverse timing of the outdoor fan more accurately, reduce the number of blowbacks of the outdoor fan, but also greatly improve the defrosting efficiency of the air conditioner.

The invention belongs to the technical field of air conditioners, and in particular relates to an air conditioner defrosting control method. In order to improve the defrosting efficiency of the air conditioner, the air conditioner defrosting control method proposed by the present invention is aimed at the air conditioner with a bypass defrosting circuit. The method includes: when the air conditioner needs to enter the defrosting mode, control the outdoor fan to stop rotating, And open the bypass defrosting circuit; after the outdoor fan stops rotating for the first set time, control the outdoor fan to reverse for the second set time; when the outdoor fan reverses for the second set time, according to t 上 , t 中 and t 下 At least one of them selectively controls the outdoor fan to reverse for a second set time; when the outdoor fan is reversed, the bypass defrosting circuit is closed, and after the outdoor fan is reversed for the second set time, time t Open the bypass defrosting circuit; time t according to t 上 , t 中 , t 下 Sure. The invention can accurately control the reverse timing of the outdoor fan, and greatly improve the defrosting efficiency of the air conditioner.

The invention relates to a gas-solid separation device, which comprises a cyclone separator and a filtering part. The cyclone separator comprises a cylindrical shell and a hollow circle bench with an upward and large opening, the opening at the lower end of the cylindrical shell is superposed with the opening at the upper end of the hollow circle bench, an air exhaust opening is provided at the top of the cylindrical shell, wherein the filtering part is positioned in the cyclone separator, the filtering part comprises an inner side filter layer and an outboard filter layer, the inner side filter layer and the outboard filter layer are connected at bottom to form a sealing end, the inner side filter layer is connected at the top to form the sealing end, and the top of the outboard filter layer and the air exhaust opening are connected. The gas-solid separation device is used for gas-solid separation to obtain the high solid particle yield, solid particle wearing is reduced, and the obstruction of the filtering part can be alleviated.